/**
 * 登录页 — 微信一键登录（规范 §4.1）
 */
// eslint-disable-next-line @typescript-eslint/no-unused-vars
import { authStore, appStore } from '../../stores'
// eslint-disable-next-line @typescript-eslint/no-unused-vars
import { ROUTE } from '../../constants'

interface LoginData {
  loggingIn: boolean
  error: string
  platformName: string
  slogan: string
}

Page({
  data: {
    loggingIn: false,
    error: '',
    platformName: getApp().globalData.platformName,
    slogan: getApp().globalData.slogan,
  },

  onLoad() {
    if (authStore.state.isLoggedIn) {
      const pages = getCurrentPages()
      if (pages.length > 1) {
        wx.navigateBack()
      } else {
        wx.switchTab({ url: ROUTE.TAB.HOME })
      }
    }
  },

  async onLoginTap() {
    if (this.data.loggingIn) return
    this.setData({ loggingIn: true, error: '' })

    try {
      const loginRes = await new Promise<{ code: string }>((resolve, reject) => {
        wx.login({ success: resolve, fail: reject })
      })

      if (!loginRes.code) throw new Error('获取微信登录凭证失败')

      await authStore.loginWithWechat(loginRes.code)

      const pages = getCurrentPages()
      if (pages.length > 1) {
        wx.navigateBack()
      } else {
        wx.switchTab({ url: ROUTE.TAB.HOME })
      }
    } catch (err: unknown) {
      const message = err instanceof Error ? err.message : '登录失败，请重试'
      console.error('[Login] 登录失败:', err)
      this.setData({ error: message, loggingIn: false })
      appStore.toastError(message)
    }
  },

  onViewPrivacy() {
    wx.navigateTo({ url: '/pages/help-center/help-center?tab=privacy' })
  },

  onViewTerms() {
    wx.navigateTo({ url: '/pages/help-center/help-center?tab=terms' })
  },
})